There is hereby authorized to be appropriated not to exceed $25,000,000 for each of the fiscal years 1982, 1983, 1984, 1985, and 1986 to carry out the pilot projects and demonstrations authorized by , the residue removal credits authorized by , and the other provisions of this subchapter: , That not to exceed $2,500,000 of such amount may be appropriated for administrative expenses to carry out this subchapter for the period beginning , and ending . Such sums shall be in addition to those provided under other provisions of law and shall remain available until expended.